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How to Regulate the Air Pressure on an Air Compressor

Regulating the air pressure is important because all air tools, like nail guns, have a maximum pressure rating. The manufacturer determines this, and the number will be printed in the operator's guide or labeled on the tool. Never exceed it for safety reasons and always use the minimum pressure to get the job done. Keep the pressure lower than 135 psi in any case. There is a safety valve which will automatically release air if the air tank pressure exceeds the maximum, too.

  1. Turn the air compressor on and allow the tank to fill. The compressor will switch off when it has reached its preset maximum.

  2. Turn the compressor off.

  3. Check the safety valve. You should check this every day. It is part of the air pressure regulation. If the safety valve fails, you could blow the air compressor up. Pull the ring on the safety valve to release air for three to five seconds. Air should escape.

  4. Release the ring. The safety release valve should reset and hold pressure. Check the pressure gauge. If the air continues to escape, the safety valve has failed and you should obtain service.

  5. Turn the compressor on and allow the tank to fill again. The compressor will switch off when it has reached its preset maximum. Allow the compressor to reach maximum pressure.

  6. Set the regulator to the pressure you want. Rotate the pressure regulator knob. The regulator pressure will show on the gauge marked "Outlet Pressure."

  7. Proceed with the work.

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